2016 Update

Task/100-doors/Java/100-doors-1.java

@@ -1,13 +1 @@
-public class HundredDoors {
-    public static void main(String[] args) {
-        boolean[] doors = new boolean[101];
-        for (int i = 1; i <= 100; i++) {
-            for (int j = i; j <= 100; j++) {
-                if(j % i == 0) doors[j] = !doors[j];
-            }
-        }
-        for (int i = 1; i <= 100; i++) {
-            System.out.printf("Door %d: %s%n", i, doors[i] ? "open" : "closed");
-        }
-    }
-}
+N.println(IntStream.rangeClosed(1, 100).filter(i -> Math.pow((int) Math.sqrt(i), 2) == i).boxed().join(", ", "Open Doors: ", ""));

Task/100-doors/Java/100-doors-2.java

@@ -1,11 +1,13 @@
-public class Doors
-{
-	public static void main(String[] args)
-	{
-		boolean[] doors=new boolean[100];
-		for(int i=0;i<10;i++)
-			doors[i*(i+2)]=true;
-		for(int i=0;i<100;i++)
-			System.out.println("Door #"+(i+1)+" is"+(doors[i]?"open.":" closed."));
-	}
+public class HundredDoors {
+    public static void main(String[] args) {
+        boolean[] doors = new boolean[101];
+        for (int i = 1; i <= 100; i++) {
+            for (int j = i; j <= 100; j++) {
+                if(j % i == 0) doors[j] = !doors[j];
+            }
+        }
+        for (int i = 1; i <= 100; i++) {
+            System.out.printf("Door %d: %s%n", i, doors[i] ? "open" : "closed");
+        }
+    }
 }

Task/100-doors/Java/100-doors-3.java

@@ -2,7 +2,10 @@ public class Doors
 {
 	public static void main(String[] args)
 	{
+		boolean[] doors=new boolean[100];
 		for(int i=0;i<10;i++)
-			System.out.println("Door #"+(i*(i+2)+1)+" is open.");
+			doors[i*(i+2)]=true;
+		for(int i=0;i<100;i++)
+			System.out.println("Door #"+(i+1)+" is"+(doors[i]?"open.":" closed."));
 	}
 }

Task/100-doors/Java/100-doors-4.java

@@ -1,13 +1,8 @@
 public class Doors
 {
- public static void main(final String[] args)
- {
-  boolean[] doors = new boolean[100];
-
-  for (int pass = 0; pass < 10; pass++)
-   doors[(pass + 1) * (pass + 1) - 1] = true;
-
-  for(int i = 0; i < 100; i++)
-   System.out.println("Door #" + (i + 1) + " is " + (doors[i] ? "open." : "closed."));
- }
+	public static void main(String[] args)
+	{
+		for(int i=0;i<10;i++)
+			System.out.println("Door #"+(i*(i+2)+1)+" is open.");
+	}
 }

Task/100-doors/Java/100-doors-5.java

@@ -2,11 +2,12 @@ public class Doors
 {
  public static void main(final String[] args)
  {
-  StringBuilder sb = new StringBuilder();
+  boolean[] doors = new boolean[100];
 
-  for (int i = 1; i <= 10; i++)
-   sb.append("Door #").append(i*i).append(" is open\n");
+  for (int pass = 0; pass < 10; pass++)
+   doors[(pass + 1) * (pass + 1) - 1] = true;
 
-  System.out.println(sb.toString());
+  for(int i = 0; i < 100; i++)
+   System.out.println("Door #" + (i + 1) + " is " + (doors[i] ? "open." : "closed."));
  }
 }

Task/100-doors/Java/100-doors-6.java

@@ -1,13 +1,12 @@
-public class Doors{
-   public static void main(String[] args){
-      int i;		
-      for(i = 1; i < 101; i++){
-         double sqrt = Math.sqrt(i);
-         if(sqrt != (int)sqrt){
-            System.out.println("Door " + i + " is closed");
-         }else{
-            System.out.println("Door " + i + " is open");
-         }
-      }
-   } 	
+public class Doors
+{
+ public static void main(final String[] args)
+ {
+  StringBuilder sb = new StringBuilder();
+
+  for (int i = 1; i <= 10; i++)
+   sb.append("Door #").append(i*i).append(" is open\n");
+
+  System.out.println(sb.toString());
+ }
 }

Task/100-doors/Java/100-doors-7.java

@@ -0,0 +1,13 @@
+public class Doors{
+   public static void main(String[] args){
+      int i;		
+      for(i = 1; i < 101; i++){
+         double sqrt = Math.sqrt(i);
+         if(sqrt != (int)sqrt){
+            System.out.println("Door " + i + " is closed");
+         }else{
+            System.out.println("Door " + i + " is open");
+         }
+      }
+   } 	
+}